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- \ Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wtgec Lane Walnut Creek Ca 94598 (510) 998 9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 Otoo <br /> EA Engineering Science &Tech Client Prol ID Exxon 7-3942, 5153942 1300 Sampled 03/03/98 <br /> 3468 Mt Diablo Blvd Ste 8100 Sample Descript P1 Received 03/04/98 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 03/11/98 <br /> Attention Chrlsta Marting Lab Number 9803306-16 Reported 03131198 <br /> C Batch Number MS031198MTBEH6A _ - <br /> strument I D H6 <br /> Oxygenate Compounds (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> Ethanol 500 N D <br /> t Butanol 10D N D <br /> Methyl t-Butyl Ether (MTBE) 20 37 <br /> Di-Isopropyl Ether (DIPE) 20 N D <br />'Ethyl t-Butyl Ether(ETRE) 20 N D <br /> t-Amyl Methyl Ether (TAME) 20 N D <br /> Surrogates Control Limits % % Recovery <br />�1,2-Dichloroethane-d4 76 114 85 <br /> Analytes reported as N D were not present above the stated limit of detection <br />'EQUOIA ANALYTICAL - ELAP 01210 <br /> rd Herling <br /> rct Manager <br /> Page 13 <br />